UNI-T UT207 Operating Manual
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UNI-T UT207 Operating Manual

Digital clamp multimeter
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Model UT207/208
OPERATING MANUAL

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Summary of Contents for UNI-T UT207

  • Page 1 Model UT207/208 OPERATING MANUAL...

  • Page 2: Table Of Contents

    Model UT207/208: OPERATING MANUAL Table of Contents Title Page Overview Unpacking Inspection Safety Information Rules For Safe Operation International Electrical Symbols The Meter Structure Functional Buttons The Effectiveness of Functional Buttons Display Symbols Measurement Operation A. DC/AC Voltage Measurement B. Measuring Resistance C.
  • Page 3 Model UT207/208: OPERATING MANUAL Title Page G. DC Current Measurement H. AC Current Measurement I. UT208 only: Temperature Measurement Sleep Mode Specifications A. General Specifications B. Environmental Requirements Accuracy Specifications A. DC Voltage B. AC Voltage C. Resistance D. Diode Test E.
  • Page 4 Model UT207/208: OPERATING MANUAL Title Page I. AC Current J. Temperature (UT208 only) Maintenance A. General Service B. Replacing the Battery...

  • Page 5: Overview

    To avoid electric shock or personal injury, read the “Safety Information” and “Rules for Safe Operation” carefully before using the Meter. Digital Clamp Multimeter Model UT207/UT208 (hereafter referred to as “the Meter”) are 3 5/6 digits with steady operations, fashionable structure and highly reliable measuring instrument.

  • Page 6: Unpacking Inspection

    Model UT207/208: OPERATING MANUAL Unpacking Inspection Open the package case and take out the Meter. Check the following items carefully to see any missing or damaged part: Item Description English Operating Manual 1 piece Test Lead 1 pair Point Contact Temperature Probe (Only UT208) (This...

  • Page 7: Safety Information

    Model UT207/208: OPERATING MANUAL Safety Information This Meter complies with the standards IEC61010-1; IEC61010-2-032: in pollution degree 2, overvoltage category (CAT. II 600V, CAT. III 300V) and double insulation. CAT. II: Local level, appliance, PORTABLE EQUIPMENT etc., with smaller transient overvoltages than CAT.

  • Page 8: Rules For Safe Operation

    Model UT207/208: OPERATING MANUAL Rules For Safe Operation Warning To avoid possible electric shock or personal injury, and to avoid possible damage to the Meter or to the equipment under test, adhere to the following rules: Before using the Meter inspect the case. Do not use the Meter if it is damaged or the case (or part of the case) is removed.
  • Page 9 Model UT207/208: OPERATING MANUAL from the input terminals of the Meter and turn the Meter power off. The rotary switch should be placed in the right position and no any changeover of range shall be made during measurement is conducted to prevent damage of the Meter.
  • Page 10 Model UT207/208: OPERATING MANUAL Replace the battery as soon as the battery indicator appears. With a low battery, the Meter might produce false readings that can lead to electric shock and personal injury. When servicing the Meter, use only the same model number or identical electrical specifications replacement parts.

  • Page 11: International Electrical Symbols

    Model UT207/208: OPERATING MANUAL International Electrical Symbols AC (Alternating Current) DC (Direct Current) AC or DC Grounding Double Insulated Warning. Refer to the Operating Manual Deficiency of Built-In Battery Continuity Test Diode Danger of High Voltage Conforms to Standards of European Union...

  • Page 12: The Meter Structure

    Model UT207/208: OPERATING MANUAL The Meter Structure (see figure 1) Hand Guards: to protect user’s hand from touching the dangerous area. Trigger: press the lever to open the transformer jaws. When the pressure on the lever is released, the jaws will close.

  • Page 13: Functional Buttons

    Model UT207/208: OPERATING MANUAL Functional Buttons Below table indicated for information about the functional button operations. Button Operation Performed Press SELECT button to select the alternate functions including SELECT (UT208 only). , %Hz, A Starts recording of maximum and minimum values.
  • Page 14 Model UT207/208: OPERATING MANUAL Button Operation Performed HOLD Press HOLD button for 2 seconds when turning on the Meter to display full icon. , press Hz to measure When the Meter is at %Hz, V and A frequency and duty cycle.

  • Page 15: The Effectiveness Of Functional Buttons

    Model UT207/208: OPERATING MANUAL The Effectiveness of Functional Buttons Not every functional buttons can be used on every rotary switch positions. Below table describe which functional buttons can be used on which rotary switch positions Functional Buttons Rotary Switch Positions...

  • Page 16: Display Symbols

    Model UT207/208: OPERATING MANUAL Display Symbols (see figure 2) Figure 2...
  • Page 17 Model UT207/208: OPERATING MANUAL Number Symbol Meaning INRUSH Indicator for Surge current Minimum reading displayed Maximum reading displayed ZERO Indicator for zeroing Data hold is active The Meter is in the auto range mode in which the AUTO Meter automatically selects the range with the best resolution.
  • Page 18 Model UT207/208: OPERATING MANUAL Number Symbol Meaning Sleep mode is on Test of diode The continuity buzzer is on : Ohm. The unit of resistance. ,K ,M k :Kilohm. 1x10 or 1000 ohms M :Megohm. 1x10 or 1,000,000 ohms Hz: Hertz. The unit of frequency.

  • Page 19: Measurement Operation

    Model UT207/208: OPERATING MANUAL Measurement Operation A. DC/AC Voltage Measurement (see figure 3) Warning To avoid harms to you or damages to the Meter from eletric shock, do not attempt to measure voltages higher than 600V AC/DC, although readings may be obtained.
  • Page 20 Model UT207/208: OPERATING MANUAL The DC Voltage ranges are: 6.6V, 66V and 600V The AC Voltage ranges are: 6.6V, 66V and 600V To measure DC/AC voltages, connect the Meter as follows: Insert the red test lead into the V Hz terminal and black test lead into the COM terminal.

  • Page 21: Measuring Resistance

    Model UT207/208: OPERATING MANUAL B. Measuring Resistance (see figure 4) Warning To avoid damages to the Meter or to the devices under test, disconnect circuit power and discharge all the high-voltage capacitors before measuring resistance. The resistance ranges are: 660 , 6.6k , 66k , 660k , 6.6M...
  • Page 22 Model UT207/208: OPERATING MANUAL Connect the test leads across with the object being measured. The measured value shows on the display. Note To obtain a more precise reading, you could remove the objects being tested from the circuit when measuring.

  • Page 23: Testing Diodes

    Model UT207/208: OPERATING MANUAL C. Testing Diodes (see figure 5) Warning To avoid damages to the Meter or to the devices under test, disconnect circuit power and discharge all the high-voltage capacitors before testing diodes. Use the diode test to check diodes, transistors, and other semiconductor devices.
  • Page 24 Model UT207/208: OPERATING MANUAL Insert the red test lead into the V Hz terminal and black test lead into the COM terminal. Set the rotary switch to . Press SELECT to switch to measurement mode. For forward voltage drop readings on any semiconductor component, place the red test lead on the component’s anode and place the black test lead on the...

  • Page 25: Testing For Continuity

    Model UT207/208: OPERATING MANUAL D. Testing for Continuity (see figure 6) Warning To avoid damages to the Meter or to the devices under test, disconnect circuit power and discharge all the high-voltage capacitors before measuring continuity. To test for continuity, connect the Meter as follows: Insert the red test lead into the V Hz terminal and the black test lead into the COM terminal.
  • Page 26 Model UT207/208: OPERATING MANUAL a circuit under test is higher than 100 . Note When continuity testing has been completed, disconnect the connection between the testing leads and the circuit under test and remove testing leads from the input terminals.

  • Page 27: Frequency Measurement

    Model UT207/208: OPERATING MANUAL E. Frequency Measurement (see figure 7) Warning To avoid harms to you or damages to the Meter from eletric shock, do not attempt to measure voltages higher than 600V AC/DC, although readings may be obtained. The frequency ranges are: 660Hz, 6.6kHz, 66kHz, 660kHz, 6.6MHz and 66MHz.
  • Page 28 Model UT207/208: OPERATING MANUAL being measured. The measured value shows on the display. Note When frequency measurement has been completed, disconnect the connection between the testing leads and the circuit under test, and remove the testing leads away from the input terminals of the Meter.

  • Page 29: Duty Cycle Measurement

    Model UT207/208: OPERATING MANUAL F. Duty Cycle Measurement (see figure 8) Warning To avoid harms to you or damages to the Meter from eletric shock, do not attempt to measure voltages higher than 600V AC/DC, although readings may be obtained.
  • Page 30 Model UT207/208: OPERATING MANUAL Note When duty cycle measurement has been completed, disconnect the connection between the testing leads and the circuit under test, and remove the testing leads away from the input terminals of the Meter.

  • Page 31: Dc Current Measurement

    Model UT207/208: OPERATING MANUAL G. DC Current Measurement (see figure 9) The measurement ranges of current are: 66A and 1000A To measure current, do the following: Set the rotary switch to 66A or 1000A Hold the Meter tight, don’t release. The Hall...
  • Page 32 Model UT207/208: OPERATING MANUAL conductor at a time, to meausre more than one condutor at a time will cause deviation. Note If the Meter does not display 00.00 when it is at 66A range, press ZERO to zeroing. After zeroing, it allows 10 digits bouncing reading.

  • Page 33: Ac Current Measurement

    Model UT207/208: OPERATING MANUAL H. AC Current Measurement (see figure 10) Warning The measurement ranges of current are: 66.00A and 1000A To measure AC current, do the following: Set the rotary switch to 66A or 1000A Hold the Meter tight, don’t release. The Hall...
  • Page 34 Model UT207/208: OPERATING MANUAL transformer jaw, otherwise it will casue deviation. The Meter can only measure one conductor at a time, to meausre more than one condutor at a time will cause deviation. When the measuring current >1A, press Hz button to step through AC current, frequency and duty cycle measurement mode.
  • Page 35 Model UT207/208: OPERATING MANUAL Note When current measurement has been completed, disconnect the connection between the conductor under test and the jaw, and remove the conductor away from the transformer jaw of the Meter.

  • Page 36: Ut208 Only: Temperature Measurement

    Model UT207/208: OPERATING MANUAL I. UT208 only: Temperature Measurement (see figure 11) The temperature measurement range: -40 ~1000 and -40 ~1832 . To measure temperature measurement, connect the Meter as follows: Insert the red temperature probe into the V Hz terminal and the black temperature probe into the COM terminal.
  • Page 37 Model UT207/208: OPERATING MANUAL Note When the Meter is at range, it beeps to remind user to insert temperature probe. The Meter automatically displays the room temperature when the temperature probe is inserted but without any input. The included point contact temperature probe can only be used up to 230 .

  • Page 38: Sleep Mode

    Model UT207/208: OPERATING MANUAL Sleep Mode To preserve battery life, the Meter automatically turns off if you do not turn the rotary switch or press any button for around 15 minutes. The Meter beeps 3 times in one minute before entering Sleep Mode and long beep one time just before entering Sleep Mode.

  • Page 39: Specifications

    Model UT207/208: OPERATING MANUAL Specifications A. General Specifications: Maximum Voltage between any Terminals and grounding: Refer to different range input protection voltage. Display: 3 5/6 digits LCD display, Maximum display 6666. Polarity: Auto Overloading: Display OL or –OL. Battery Deficiency: Display Sampling: 3 times per second.

  • Page 40: Environmental Requirements

    Model UT207/208: OPERATING MANUAL Battery Life: typically 150 hours (alkaline battery) Dimensions: 285.3mm x 105mm x 44.5mm Weight: Approximate 533g (battery included) B. Environmental Requirements The Meter is suitable for indoor use. Altitude: Operating: 2000m Storage: 10000m Safety/ Compliances: IEC61010-1; IEC61010-2-032. CAT.II 600V, CAT.III 300V over voltage and double insulation standard, pollution degree 2.

  • Page 41: Accuracy Specifications

    Model UT207/208: OPERATING MANUAL Accurate Specifications Accuracy: (a% reading + b digits), guarantee for 1 year. Operating temperature: 23 Relative humidity: 80%R.H Temperature coefficient: 0.1x(specified accuracy)/1 A. DC Voltage Range Resolution Accuracy Overload protection 6.600V (0.8%+1) 66.00V 10mV 600V DC/AC 600.0V...

  • Page 42: Ac Voltage

    Model UT207/208: OPERATING MANUAL B. AC Voltage Range Resolution Accuracy Overload protection 6.600V (1.2%+5) 66.00V 10mV 600V DC/AC 600.0V 100mV Remarks: Input Impedance: 10M Frequency Response: 40Hz~400Hz Change to AC: Combine AC and True RMS response method. Input sine wave to adjust. Non sine wave must follow the below data to adjust: Peak factor: 1.4~2.0, add 1.0% on the stated accuracy...

  • Page 43: Resistance

    Model UT207/208: OPERATING MANUAL C. Resistance Range Resolution Accuracy Overload protection 660.0 (1.2%+2) 6.600k 66.00k (1%+2) 250VAC 660.0k 6.600M (1.2%+2) 66.00M (1.5%+2) D. Diode Test Range Resolution Accuracy Overload protection 0.5V~0.8V (Open circuit voltage 250VAC approx. 3.0V)

  • Page 44: Continuity Test

    Model UT207/208: OPERATING MANUAL E. Continuity Test Range Resolution Accuracy Overload protection Around 30 ,the buzzer beeps. 250VAC (Open circuit voltage approx. –1.2V) Remark: The buzzer may or may not beeps when the resistance of a circuit under test is between 30 ~100 The buzzer does not beep when the resistance of a circuit under test is >...

  • Page 45: Frequency

    Model UT207/208: OPERATING MANUAL F. Frequency Range Resolution Accuracy Overload protection 660.0Hz 0.1Hz 6.600kHz 0.001kHz 66.00kHz 0.01kHz (0.1%+3) 250VAC 660.0kHz 0.1kHz 6.600MHz 0.001MHz 66.00MHz 0.01MHz Remarks: Input Sensitivity (a) as follows: When a 10Hz: the Meter does not response When 10Hz < a 100kHz: 300mV rms...

  • Page 46: Duty Cycle

    Model UT207/208: OPERATING MANUAL G. Duty Cycle Range Resolution Accuracy Overload protection 0.1%~99.9% 0.1% For reference only 250VAC H. DC Current Range Resolution Accuracy Overload protection 66.00A 0.01A (2%+40) 250VAC 1000A (2%+8) Warning The operating temperature must be 0 ~ 40...
  • Page 47 Model UT207/208: OPERATING MANUAL Remarks: If the reading is positive, the current direction is from bottom to up. See figure 10, the front case face up while the bottom case face down. Hold the Meter tight, do not release. The Hall components are very sensitive not only to the magnet but also to heat and machines reaction force.

  • Page 48: Ac Current

    Model UT207/208: OPERATING MANUAL I. AC Current Range Resolution Accuracy Frequency Overload protection Response 66.00A 0.01A (2%+40) 50Hz ~ 60Hz 250VAC 1000A (2%+8) Warning The operating temperature must be 0 when measuring current. Remarks: It may have unstable or wrong sensed readings, it will not affect measurement result.

  • Page 49: Temperature (Ut208 Only)

    Model UT207/208: OPERATING MANUAL Non sine wave must follow the below data to adjust: Peak factor: 1.4~2.0, add 1.0% on the stated accuracy. Peak factor: 2.0~2.5, add 2.5% on the stated accuracy Peak factor: 2.5~3.0, add 4.0% on the stated accuracy.

  • Page 50: Maintenance

    Model UT207/208: OPERATING MANUAL MAINTENANCE This section provides basic maintenance information including battery replacement instruction. Warning Do not attempt to repair or service your Meter unless you are qualified to do so and have the relevant calibration, performance test, and service information.

  • Page 51: Replacing The Battery

    Model UT207/208: OPERATING MANUAL B. Replacing the Battery (see figure 12) Warning To avoid false readings, which could lead to possible electric shock or personal injury, replace the battery as soon as the battery indicator “ ” appears. Make sure the transformer jaw and the...
  • Page 52 Model UT207/208: OPERATING MANUAL To replace the battery: 1. Turn the Meter off and remove all the connections from the input terminals 2. Turn the Meter’s front case down. 3. Remove the screw from the battery compartment, and separate the battery compartment from the case bottom.
  • Page 53 Model UT207/208: OPERATING MANUAL * END * This operating manual is subject to change without notice.
  • Page 54 Model UT207/208: OPERATING MANUAL Copyright 2007 Uni-Trend Group Limited. All rights reserved. Manufacturer: Uni-Trend Technology (Dongguan) Limited Dong Fang Da Dao Bei Shan Dong Fang Industrial Development District Hu Men Town, Dongguan City Guang Dong Province China Postal Code: 523 925...

This manual is also suitable for:

Ut208

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